Window-screen clip



GEORGE Bonsai, i or' Warnnrs, i i

` TUBING suivirent?, for 'Wi-irnaniiii, Ycon.ne'i:rc ir,'

Patented Aug. 261, 1936 i,Uni-"ranfisfflai"asg yc caninc'riciir, essie-noia. Tof scovILL ivIANUrAc- 5 j ccnrcnarionj :or Y,Colv- Y .jWIVlST'Doivl-scnnnn cur Appiianpii flied February 14, "1929. seiiaiiio'.339,769.

vThis invention Lrelates vto Vwindowv screens and more particularlyy to screens of the eX- pansion or adjustable type;V

vtofore known, have been subject to'fvariou's objections. VFor example,"-tlieylfdo lnot give proper sliding contact; they; are expensive t0y manufactureV andr'diflicult to assemble; and they are liable to worlrloose under-use.

' It is an object ofthe present inventiony to,v

provide an expansion screen `having vindivid-y ual bearing v"elements, suchtliat thesev ele-r ments .are economical to;y manufacturel and,v assemble; such that'they are firmly heldin place; and such that thejscreen sectionshave j easily sliding actionwithout sticking.

f "It-is afurther objectof the invention t0 construct lthe bearing element of sheet -nietal, thereby producing av simple, '.cheap, yet' eective constructionl and one' which is ladapte'dfor manufacture in largey quantities yfat low cost.y f

Another object is toprovidea and uniform anchorage for thebearing Velement. 'e With these general objects in view the inventi'on consists inthe features, combinations, details of construction and arrangements of parts which will first bei described in connection with the accompanying drawing andy then more particularly pointed out. t Inthe drawing: f

` Figure l is a perspective view, with parts ,y broken away and in section, of anexpansion screen constructed in invention; j Y

Figure 2 is a sectional view (enlarged) vtaken on the line 2 2 of Fig.V l; and

Figure' yis a perspectiveview of a bear.

4.ing element removed and enlarged.`

Referring to the drawing, ythe screen illusltrated as anfexample comprisestwowooden overlapsk another and the Vtwo sections areaccordance with l the framesections; Gnesectioinxwhi'ch may be termed the inner section, comprises a top bar or moulding 5 andabottoinbar 6 connected i at one end by an'end strip 7, rThey other section,which may be termed the `outer sece;

tion, comprises corresponding top,1 bottcm and end pieces 5a, 6a, and7a'.:-At theoverlapping ends the frainesarc,open.`

Suitably secured inthe frame sections are screensA proper 8,9 of wire lmesh or other 1 .suitable material. yAtthej openends of the frame the screens vhave finishing strips l0, l

11.V Extreme open position of the screen i lixedrby the mutual Vengagementoftliese.

`finishing'strips. vExtreme*closed positionis f fixed by the engagement ofthe top and bot-z 5 tom bars of Yene frame section' with Vthe end stripbeing thicker than athego'therstrips te provide stop-shoulders. j Y i i i 'In the Aconstruction i The" inner section has i one or more bearing elements sliding inthe groove of theV cuter section, and outer `section has one or, more bearing elements sliding in the groove of the inner section. Y

Y. In the exemplificationV here illustrated, the top bar 5 has a dovetail groovel2, undercut .upwardly vandrzdownwardlyl as appearsin Fig. .2. The topbar a has a similar but frev'ersely faced. groove.y 12E?.

l Anchored in theopen end yof groove l2 is a bearing element, hereinafter'described, having a por llustrated, "the ltwo frame lsections have co;inpleinentary Vgrooves ,for 'recelviiigV individualbear-ing elements.

Open end o f groovel2a to slide ing-roovel-2. These groovesjand bearing elements are v duplicated in the bottom bars of the respective frame sections. `Tlius, all the'v direct? sliding contact isv taken by the-.four bearing elements, whereby sliding friction is reduced toa minimum;

l'Ilie invention in its entirety includes a bearingelement of metal having anchoring teeth which are arranged to anchor the eleinentin the groove at both sides thereof. In

#the embodiment here shown -as Vvan y e:\iample,

the bearing element is a clip l5 having ka smooth side 16 larid depending sides 17 v.

tion arranged to slidey in groove n similarv bearing element is anchored in the leo.

which are concaved so as to 'be accommodated in the opposed dovetail grooves, as in Figure 2. The clip is substantially U- shaped in transverse cross-section. f The depending sides terminate in prongs or teeth which are preferably four in number, two for each side. Each tooth is formed, for eX- ample, by slittingthe metal obliquely as at sides of theV grooves to hold the two sections together while allowing sliding movement of the sections. Thus, the clip serves as a bearingmember and also serves to hold the two sections together. l There is a smooth easy` running contact for the section that rides on the clip as a bearing, as there is no cut metallic edge offering resistance. On the contrary, bent edges between the flat `side 16 and the depending sides 17 are smooth and offer little friction` opposing movement. Y

`To assemble the parts,I the four clips l5 are inserted by hand as far into the open ends of the grooves as possible. The sides,

16, of the clips are slid'into the respective grooves and the dove-tailed connections prevent wabbling of the clips in the' grooves.

. Then the screen sections are given a sharp,

firm closing movement. This closing forces the` clipsl into final position kin .the grooves,

ythe teeth `biting into thel relatively soft wood,

therebyanchoring the clips in place. The toothed sides enter their grooves without diiiculty,as the clips arev held in proper longitudinal alignment by virtue of the dove-tailed connections with the other section. The teeth are in the nature of prongs which extend in angular fashion from the material of the sides `of the grooves and provide a firm, uniform anchorage for the clip in the-groovef-an'anchorage which eX- tends uniformly over the entire anchored portion of the clip. In the clip shown, the teeth provide four, uniformly spaced points of anchorage and a rigid assembly of the Vclip in the groove.

The construction described gives an easy sliding movement without tendency to stick; the clips are economical to manufacture as they can. be produced from sheet metal by a simple stamping and bending operation; and the clips are easily assembled and firmly anchored without the necessity of tools or extraneous fastenings.

While the invention is capable of various embodiments, it is noted that the clips here illustrated are adapted to use with a more or less common form of groove.

What l claim is:

l. In a window screen, and in combination, complementary frame sections, means for sliding said frame sections one upon the other comprising grooves cut in the front sections, and metallic bearing members for the grooves, said members being formed of sheet metal of substantially "Ll-shaped transverse cross-section, the bight portions of said members being smooth and the ends of the leg. portions being toothed.

2. Tn a window screen, and in combination, complementary frame sections, means for sliding said frame sections one upon the other comprising dovetail grooves arranged in opposed relation in adjacent frame sections, and metallic bearing members for the grooves, said members being formed Aof sheet metal of substantially Etil-shaped cross-section, the bight portions of said members being flat and smooth to allow one section to slidethereon, the leg portions being concaved for interlocking the dovetail grooves and having teeth struck out of the metal for biting into thek sides of the grooves of the section.

' 3. A bearing element for relatively sliding members comprising a unitary piece of sheet metal with a substantially lil-shaped transverse section and having a flat, smooth bight portion for engaging a groove in one member and leg portions with teethstru'clrout ofthe metal for biting into the'. sides of ya'groove in the other member.

la A bearing element for relatively sliding members comprising a unitary piece of sheet metal with a substantially Htl-shaped transverse section and having a fiat, smooth bight portion forengaging a groove in one member and leg portions with teeth struckout of the rmetal for biting into both sides of a groove in the other member, thejleg portions being concaved to provide a dovey tailed running portion. sides of the clips. The prongs bite into the A bearing element for relatively sliding members comprising a unitary piece of sheet metal with a substantially U-shaped transverse section and having a fiat, smooth bight portion for engaging a groove in one member and leg portions with teeth projecting therefrom, said teeth being formed by oblique slits in the metal terminating in limiting apertures, the metal at the acute angles being bent out from the planes of the leg portions.

6. A metallic bearing element for relatively sliding sections comprising a' portion for sliding relative movement in a groove in one section, said portion being smooth throughout its contact with the walls of the groove and without any eut edge contacting with the material of the walls,'and means ,-bight portion Vbeing `adapted for" lsliding movement in ,a groove in one section, and Y Vset my hand.

for anchoring said element to the other y section. o

7. A metallic bearing element for relatively sliding sections, comprising a unitary` piece of sheet metal having a bight portion y f and leg portions extending therefrom, the

the

tions being smooth bends in the metal, the" leg portions being concaved to provide dovefV tail f running portions yand havingV teethy struck-out from the metal for anchoring the leg portions to the other section.,l

In testimony whereof, I have hereunto GEORGE BODEN.Y 'l y i having a smooth flat j integrally united therewith, 

